You could try this book for herbs, it's pretty thorough and fun to reference:
https://www.amazon.com/gp/aw/d/0875421229/ref=dbs_a_w_dp_0875421229
Here's one for crystals: https://www.amazon.com/gp/aw/d/0875421261/ref=dbs_a_w_dp_0875421261
This author Scott Cunningham was a wiccan so keep that...